Electric-arc lamp.



PATENTE D SEPT. 1, 1903.

T. L. GARBONE.

ELBGTRIC ARC LAMP.

APPLICATION FILED JAN. 6. 1903.

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T. L. GARBONE.

ELECTRIC ARC LAMP.

' APPLICATION FILED JAN; 6, 1903.

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PATENT OFFICE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 737,824, datedSeptember 1, 1903. Application filed January 6, 1903. Serial No.138,041. (No model.)

To all whom it may concern.-

Be it known that I, TITO LIvIo OARBoNE, a subject of the King of Italy,residing at Grunewald, near Berlin, in the Kingdom of Prussia, GermanEmpire, have invented certain new and useful Improvements in Are- Lamps;and I do hereby declare that the fol-' lowing is a full, clear, andexact description.

The present invention relates to an arclamp with electrodes inclined toeach other at an acute angle, each electrode consisting of two carbonrods which are also inclined to each other at an acute angle.

In the new arc-lamp the lower ends of the carbon rods of each electrodeare guided together by a suitable guiding-plate, the car:

bon rods being suspended by means of linkarms on a sliding plate whichis guided in the direction of the electrodes, while the upper ends arealways guided in the same inclination by means of clamps suspended onthe said link-arms and by means of a support provided with awedge-shaped projection. This arrangement has the object of obtaining anautomatic feed of the electrodes as Fig. 2"-is an end View seen from theleft side, K

the rigid support having been removed for the purpose of showing theinner parts. Fig. 3 is a plan View corresponding to Fig.1. Fig. 4 showsthe rocking support in front view. Fig. 4 is a section on line 4 4 inFig. 4. Fig. 5 is the end View corresponding to Fig. 4. Fig. 6 is asection on 6 6 in Fig. 1. Fig. 7 corresponds to Fig. 6, the plateshaving been shifted from one another. Fig. 8 shows the underinost partof two carbon rods and their support, partly in section. Fig. 9 is asection on 9 9 in Fig. 8. Fig. 10 shows the device for cutting ofithelamp from the circuit after the carbons have been consumed. Fig. 11shows a sliding piece with its link-arms and the clamps for thecorresponding carbon rods which form one electrode. Fig. 12 is thecorresponding end view. Fig. 13 is the corresponding plan View.

Two angle-pieces 2 3 project from the insulating carrier-plate 1,serving as a support at the same inclination as the electrode.

Facing this support 7 there is arranged another support 8 at theinclination of the other electrode, which is journaled at 9 on thecarrier-plate 1, so that it can have a slight rocking movement. On saidsupports 7 and 8, inclined in the direction of the electrodes, slidingpieces 10 are arranged adapted to surround the edges of theircorresponding supports in order to be securely guided, and that withonly a slight friction. Clamps 12 are hung on the sliding pieces 10 bymeans of link-arms 11, the said clamps holding the carbon rods. Thecarbon rods 13 14 form the one and the carbon rods 15 16 the otherelectrode.

Each support 7 and 8 has a wedge-shaped projection 17, the edge beingbelow and the back being above. (See Figs. 4 and 5.) The carbon-clamps12 are freely suspended to the sliding plate 10 by the link-arms 11 insuch a manner that they may slide with their rounded edge 12 on the sidefaces of the wedge-shaped projection 17. The clamps 12 carry the carbonrods 13, 14, 15, and 16, respectively. The lower ends of the two carbonrods, which form one electrode, pass through the foot 18 of the support7 and 8,

respectively. By means of adjustable setscrews 19 the lower ends of twocorresponding carbon rods are brought together, while the rounded edges12 of the clamps 12 rest on the side faces of the wedge-shaped projection 17. A pin 20 is revolubly mounted on each support 7 and 8 by meansof an arm 21, so that it may be laterally shifted a little in a slot 22of the support 7 and 8, respectively. The pin 20, provided between thetwo carbon rods of each electrode, prevents the carbon rods from beingbent by the weight of the sliding piece 10, and, further, a sure guidingof the carbon rods is secured, since the pin may be easily moved fromone side to the other if the carbons are uneven.

The coil 23, carried by the angle-pieces 2 3, serves for the productionof the arc, the armature 24 of the coil 23 being attracted against themomentum of its own weight when a current passes through the coil. Themovement of the armature 24, which can be regulated exactly by means ofscrews 25, operates on the support 8 by means of an arm 26, rigidlyconnected with the armature, and a link-arm 37, attached to cars 28 ofthe support 8. When current thus passes through the coil 23, theelectrode which consists of the carbon rods 15 16 and before restedagainst the carbon rods 13 14 of the other electrode moves to such adistance that an arc of the desired length is formed. In the measure oftheir consumption the carbon rods sink down, because the sliding plates10 and the clamps 12 find only a very slight frictional resistance onthe corresponding supportand because the link-arms 11 and clamps 12admit a light movement of the carbon rods in their proper direction. Thebase-plate 6 must, of course, be provided with a larger aperture for themovement of the movable carbon rods 15 16. While the lamp is burningthis aperture of the baseplate 6 is closed by two plates 29, havingnotches corresponding to the carbon rods 15 16. These plates 29 arepivoted on the baseplate 6 and are cut out on their facing edge in sucha way that said plates are closed and opened apart automatically by apin 30, fixed on the lower end of the swiveling supports 8. As long asthe lamp is not lighted the carbon rods 15 16 of one electrodebearagainst the carbon rods 13 14 of the other electrode, and the saidpin keeps the two plates 29 apart. When, however, the coil 23 moves theswiveling support 8, the said pin 30 strikes against projections 31 ofthe plates 20 and closes them.

In order to cut off the current of the lamp as soon as the carbonsarecompletely burned out, the following arrangement is provided: Twoprojections 32 are provided on one of the sliding pieces 10, which bearfrom both sides against a lever 34, pivoted at 33. As soon as thecarbons are completely burned out the projections 32 bear against thelower end of the lever 34, so that the latter is shifted laterally inthe position shown by dotted lines, Fig. 10. By this arrangement the pin35, resting in a notch on the upper edge of the lever 34, is released,so that an arm 36, carrying the pin 35, falls and moves the movable part37 of a switch mounted to the arm 36. If the pin 35 rests in the notch34 of the lever 34, the movable part 37 is in contact with the rigidpart 38 of the switch. The rigid part 38, of insulating material, isprovided with the contact-screw 38, to which is connected the one poleof the source of electricity, whose other pole is connected to the screw8 of the rocking support 8. The coil 23 may be connected in a shunt tothe main current at 37 and 8. If desired, the coil 23 may be connectedin series to the main current.

Having now described my invention and in what manner the same is to beperformed, what I claim, and desire to secure by Letters Patent, is-

1. In arc-lamps, the electrodes of which are inclined together at anacute angle, each electrode consisting of two carbon rods also inclinedtogether at an acute angle, the combination of sliding plates, link-armsand clamps for supporting the carbon rods, with supports provided with awedge-shaped projection and means for guiding thelower ends of saidcarbons, substantially as shown and described.

2. In arc-lamps, the electrodes of which are inclined together at anacute angle, each electrode consisting of two carbon rods also inclinedtogether at an acute angle, the combination of sliding plates, linkarmsand clamps for supporting the carbon rods, with supports provided with awedge-shaped projection, one support being fixed and the other pivotedto the frame-plate and adapted to be rocked by an arc-starting coil, andmeans for guiding the lower ends of said carbons, substantially as shownand described.

3. In arc-lamps, the electrodes of which are inclined together at anacute angle, each electrode consisting of two carbon rods also inclinedtogether at an acute angle, the combination of sliding plates, link armsand clamps for supporting the carbon rods, with supports provided with awedge-shaped projection, a movable pin and set screws for guiding thelower ends of said carbons, substantially as shown and described.

4. In arc-lamps the electrodes of which are inclined together at anacute angle, each electrode consisting of two carbon rods also inclinedtogether at an acute angle, the combination of sliding plates,link-arms, clamps forsu ortiug the carbon rods su orts uiding saidclamps and means for guiding the lower ends of the carbons, with adevice for short-circuiting the lamp, after the carbons are consumed,consisting in two projections of one sliding plate and a pivoted lever,shifted laterally by said projections in their undermost position,substantially as shown and described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

TITO LIVIO CARE ONE.

\Vitn esses WoLDnMAR HAUPT, HENRY I-IAsPER.

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